Re: [Xen-devel] [PATCH v2 2/3] x86/vpmu: Disable VPMU if guest's CPUID indicates no PMU support

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 17.02.17 at 18:40, <boris.ostrovsky@xxxxxxxxxx> wrote:
> --- a/xen/arch/x86/cpu/vpmu_intel.c
> +++ b/xen/arch/x86/cpu/vpmu_intel.c
> @@ -884,6 +884,10 @@ int vmx_vpmu_initialise(struct vcpu *v)
>      if ( vpmu_mode == XENPMU_MODE_OFF )
>          return 0;
>  
> +    if ( MASK_EXTR(v->domain->arch.cpuid->basic.raw[0xa].a, 
> +                   PMU_VERSION_MASK) == 0 )
> +        return -EINVAL;

How about other unsupported (too large) values?

Jan


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel